Suspension jack for gang saws



x md .QW w mm1 NW www 4. QN @N N -Y NN L. CRANE SUSPENSION JACK FOR GANG SAWS Filed May l0 1922 @et Z3 i923.

Patented @ce 23, i923.

e g 1,47t65o PATENT. ori-lcs o LESLIE CRANE, or Rumi-LAND, vneiuoiufr, AssIeNortor ONELHALF 'ro r Rgrnficj MANUFACTURING eoMrANY, orv BUTLAND, viert-MONT, `AooRroiaamroiv'(invitia- .Nomn Y "SUSPENsioNfJAQK 'FOR GANG SANS;

i Amnieatmnieu-unav1o,i922;Y serial Nlssaezs'.:

To all whom/t may c'mcern':k v `Be it known that I, LESLIE CRANE, a citi- Yzen of the Unitedy States, yresiding at Rutland,

' in the county ofl Rutland and Statev of Ver- Y Improvements in Suspension J ack Yfor Gang Saws, of which the following is `a specica.- ,c tion, reference; being had therein y13o-the ac- Vio ' the lubricating'means is protected from theV vao mont, have invented certain new and "useful companyingdrawing. ,f A

Y' This inventionrelates to certain Anew and useful improvementsvinsuspension jack for gang saws,the objectV being to provide a jack for connecting 'the "suspension bars of a vstone sawing machine to the gang saw frame whereby the frame will be supported in a rigid' mannen-and means 'providefdrfor lubricating the jack in such amanner that dirt and dust arising from the saws 'inope eration. l Y .l

Another and further object of theVV invention is to provide a suspension jackformed of twomembers 'so connectedV together and vconstructed that vanoil receptacley is4v providedv for thoroughly lubricating the'bearing, means being provided inthe form 'of a ysplit bushingfor taking up the wear to prevent lost motion.` j f I ,Another and urtherobject of the 'inven-Y tion is to provide a suspension jack in'which l' the parts are sorconnected and securedtof gether that thev lubricant is prevented from wasting and a construction is provided which enables the sections'of the jacks to be l yreadily assembled or't'aken apart.y

' Other and further objects andadvantagesrof the inventionl will behereinafter set forth V'and the novel eaturesthereof definedlby the upper section 2, the lower section." being appended claims'. r In; the drawings,

improved construction o'iv jack, partly lin same to a gang saw frame; o K

Figure 2 is asection taken at right angles to Figure 1; and y y Figure 3 is a perspective view pension pin and bushing. o f ln carrying out my' inventionl' -employ a jack vcomposed ofa lower section 1 landan VVof theisus- Vvadapted to be connected 4to the corner ofthe gang saw frameand fthe upper -section to the suspension vbars `carried by the Isway bar Vof the sawing machine.

f The'lowerslection'liisformed hol-'lowland isyp'rovided with .aperturedlfootportionsf 1 frame5,as clearlyshown in Figures 1andj2.

channeledrextension 6 infwhich' isgsecuied a' l suspension bar-k7 overwhich-i'sarranged aV diagonal brace 8, kthe suspension" bar-7 and the brace 8 being secured tozthelextension bar and bracefbeing.connectedfto thesway L bar on o thetsawing.- machine in :the ,'usual manner."

The hollow lbase member 1fforms-anioil `by bolts 9 as clearly shown,rthe suspension receptacle and Afthe 'sides thereof 'are pro- .vided withr apertured bosses 10, oneV ofthe v bosses being provided with a groove f 11V for the purpose hereinafterfullyy described;- l,

The upper section 2 is provided-with a central dependingportionalQ andaa hoodportion -lwwhich Yextends `down 'overgthe sides of fthersectionl inordentoiorma cover` for the-oil :receptacle formed therein.

,The central depending portion 12 of theups'ol per section is provided with an nopeningfhav-*Qy v :ing a curved-'upper portion; anda three- :sidedlower portion'in which isarranged va splitfbushing 14, the exterior vofwhich corresponds inshape to the opening 'inthe depending portionfsoV as-to prevent thejbush-y ing from rotating within the` dependingportionnofthe upper'sectionj and while-,Iyhave shown an opening and bushing formed ofa :particular shape, itis, of course; understood rthat Iy do not Wishy toj'limit myself to. the use Y p"'of;theparticularshape shown as I am aware that slight changes can befmade. without departing from my invention, as theessential v eature of formingk the bushingfand open- Figure l is a vertical'section through my ing 'is to provideA means for Apreventing the bushing from rotating and atvthe same. time allowfthe bushing Vto contract 'and' expand .to @t the suspension pin, ,hereinafter described,y which Vpasses therethrough. Y

Extending transverselythrough'thebushe' ing 14: and the bosses 10 isavsuspension' pin 15 having at one end -a jhead 16`and a lug 17,

theglug 17 being adapted to extendwithin the, notch -11 in order to preventy the pin f lfrom rotating. q They head serves tofform 'a closure for the enduof the oil receptac1e. Y The suspensionpin 15 is 'provided with a longitudinal bore throughV which extends of f bolij y18, the headA 19 of which is seated in a.

suspension pin in position within the bushing in such a manner that the oil receptaf cle formed in the lower section-,isclosed Vor sealed at this point to prevent leakage.

*The* oil within. the chamber of thelower section is preferably maintained at va level Y 'aszfshownin` dotted andl dash lines in Figure 1' and the bushing let is provided with ofV the upper sectionso that the lubricanty will 'be supplied freely .to the suspension-pinV p anopening23 registeringwith an opening yns 24:. formed in the l.depending portion 12 Y so as to maintain` the Vsaine thoroughly lubrithe lower section, a bushing carried by the upper section, a suspension pin fixed to said'r cated.` The :lubricant is supplied to the receptacle throughY a plug closed opening 25 'and the oil receptacle is .provided witha drain plug closedopening 26 in order to al low the lubricant to be removed therefrom.`

In orderato provide means for talr'ing'upr lost motion inthe bushing,fI provide the up-` per section with bores 27 which are enlarged as shown at 28 and in -which I arrangenuts 29 through which adjusting bolts .30 are vadapted to' work, said bolts engaging the bushing 14 in such a manner that by tightening the nuts, the'bushing will be compressed around the suspension pin in order to take up' any.' lost motion and these bolts are provided with set nuts 31 for locking them inf adjusted position.

From the foregoing description. it will be seen that I have provided a suspension 'jack tofbe used in connection with a stone saw ing machine composed of a lower section vwhich isfrigidly VVAconnected 'to the gang-y saw frame and an upper section which 'is pivotal'ly connectedto the lower sectionin such a manner that the bearing is main-y i tained thoroughly lubricated and in such a manner that the lubricating means is pro-- "t'ected'v from the dust-,arising from the saws when in operation.

It'will also be seen that means` in the form of a bushing isprovided for the suspension pin so as to take up lost motion in casev of wear. While I have shown certain details of construction, I am aware that changes can be made without departing from the spirit of my`invention-` What I claim is zy 1i suspension'jack for gang saws comprising-'a hollow lower section, an upper section provided with a projection extending into said lower section, said upper section having" a hood portion extending over lower section extending through said bushing, said bushing and depending portion being `Vprovided with oilv passages forming 1 lower section being provided with apertured bosses, an .upper section having ahood portionlextending over the lower section and a central depending portion extending into the lower sectioina non-rotatable split b'ush.- ing arranged within said depending por'- tion, a suspension pin extending through said bosses and bushing., means for securing said pin to said lower section and bolts carried-Y by the upper section.V arranged toengage said split bushing for adjusting said bushing on said pin.`

f 3. A suspension l jack for gang saw framesform'ed of two sections pivotally con nected together, the lower section being ,Y

providedy with anY oil receptacle and the upper section with a bushing, a headed. pin, ex tending through the walls ofthe lower section and said bushing, said pin being keyed n to the lowerl section and a bolt extending lonfgitudinally through said suspension pin carrying a cap.

4. A suspension jack for gang saws coinprising a hollow base section having feet portions for connecting `the sanie to a gang saw'frame and an upper section having an extension for connecting the same, to the sway bar, said upper section being provided with a central depending portion having an irregular shaped opening, a bushing corresponding in shapeto said opening 'arranged therein and anon-rotatable pin extending transversely through the walls of saidlower `section' and said bushing and ineans for'securing said pin 'within the lower f section. v n

5. A suspension )ack for gang saws composed of two sections, onesection being formed hollow and the other having a projection extending into the hollow portion of Vsaid section, a hood portion carried by the upper section of said jack, a bushing carried by the upper section of said jack and a suspension pin extending through the lower section and bushing having means for securing it in posi-tion therein.

6. A suspension jack for gang saws com prising a base section adapted to be connected to kthe gang saw frame and a top section adapted tol be connected to the suspension bars, said base section being provided with an oil chamber having apertured bossesin itsr side walls, one of the bosses being provided with a slot, the upper section being provided with a depending portion extending into the hollow portion of iio the base section and provided with :in opening, a bushing arranged in said opening, it pin extending transversely through the bosses of the lower section and bushing of the upper section having'a projection extending -into the slot thereof and a hood portion formed on the upper section extending over said base section. y

7 A suspension jack for gang saws oomprising e fixed sectionfand e swinging sec tion pivotally connected together, said ixed section being provided with an Voil chamberand a Suspension pin K4for connecting seid sec-tionsI having Ineens for securing said pin to said fixed section.

8. A suspension jack .for swinging gang saws composed of two sections, one section being provided with an oilchamber to receive a projection of the other section, said projection being provided with en opening to receive e split bushing, a suspension pin lextending throughthe Walls 'of seid base section and said bushing, means for securing said pin in position thereixnnuts arranged Within the upper section and bolts Working yin said nuts adapte-d to engagesaid split edjustingsaid bushing on said bushingfor 9. A. suspension jack for gang saw frames formed of two sections pivotally connected V3o together, one sectionbeing provided with an n Aoil chamber-and the other With a hood eX- cap cart In testimony whereofV I hereunto eix my l signature. Y t

LESLIE CRANE. 

